Sheet-metal pack.



PATENTED MAY 9 A. PATERSON.

SHEET METAL PACK.

APPLICATION FILED 001s. 1903.

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M QM Lu 52 all! w w a WITNESSES NTTED STATES Patented May 9, 1905.

PATENT FFICE.

SHEET-LMETAL PACK.

SPECIFICATION forming part of Letters Patent No. 789,169, dated. May 9, 1905.

Application filed October 6, 1903. Serial No. 175,977.

To all whom it may concern.-

Be it known that 1, ALEXANDER EATERsoN, of VVilkinsburg, Allegheny county, Pennsylvania, have invented a new and useful Sheet- Metal Pack, of which the following is a full, clear, and exact description. reference being had to the accompanying drawings, forming part of this specification, in which Figures 1, 2, and 3 are plan views showing plates or sheets and indicating one method of folding according to my invention. Figs. 4, 5, 6, and 7 are similar views showing another method of folding the plate or sheet. Fig. 8 is a view of the pack folded from the sheet of Fig. 7, with an interleaf. Fig. 9 is a view showing two of the folded plates of Fig. 7 interleaved with each other; and Fig. 10 is a view showing the pack folded from the sheet of Fig. 4, with two intcrleaves.

My invention relates to the forming ofsheetmetal packs for rolling, and is designed to provide a new and improved pack.

Heretofore packs have been made either by matching separate bars or plates or by folding a sheet endwise to produce two or more plies. Such methods necessitate the rolling of long strips, and one or more doublings are usually employed at dilferent stages in the rolling operation.

My invention is designed to provide a pack which is formed by doubling a plate or sheet in two dilferent directions lengthwise and crosswise. I am thereby enabled to form the sheet or plate for doubling on an ordinary plate or sheet mill and then cut and fold the sheet to form the pack and finish it either on the same mill or on an ordinary single-finishing mill.

In the drawings, referring to Fig. 1, I show the plate or sheet 2 as being slitted along lines a a at the middle of the sheets, these slits being slightly separated from each other at the center to leave a connecting-web at this point. After this slitting has been done the sheet is folded along the dotted line b b, making two-ply, and is then folded along the line of the slits, thus giving a four-ply pack. It will be noted that in this pack all of the layers or plies are connected together at the front ends and two also at one front corner.

In Fig. 2 the sheet 3 is slitted along the lines a and also longitudinally along the line 0 through the center of the sheet. This sheet is then folded up crosswise and lengthwise along the lines of the slits and along the longitudinal line I), thus giving a six-ply pack. In this pack some of the layers are also connected at the front ends and some at the front corners.

In Fig. 3 I show another form, wherein the sheet 4 is transversely slitted along the lines a and also longitudinally along the line 0, extending through the central portion of the sheet. This sheet is then folded up lengthwise and crosswise in the same manner as the preceding forms, thus giving an eight-ply pack.

In theforms above described itwill be noted that there are two solid ends at the front end of the pack that is, at least four of the plies are integrally united at the front end.

In Figs. 4, 5, 6, and 7 I show another form of the invention, wherein there is only one solid end-that is, only one pair of leaves or plies are integrally connected across the front end.

In Fig. 4 the sheet is transversely slitted along the lines (Z (Z and longitudinally along the line a. the sheet inwardly to the connectingweb between the inner ends of the cross-slits. This pack is then folded up along the lines of the slits, giving a four-ply pack in which two of the sheets are integrally connected at the front end, and others are integrally connected along the front corners. In this view I have shown along the longitudinal central line a partial slit f between the two plies, which are integrally connected at the front end. This partial slit is merely for eonveno ience in folding, andit may be applied to any or all of the forms shown. l/Vhen I refer in The slit 6 extends from the end of my claims to a solid front end, I mean to include the integral front connection, even if this is partially slitted, as shown in Fig. 4.

In Fig. 5 I show a form for a six-ply pack in which the sheet 6 is slitted along the lines (Z and also along the longitudinal central line a. This gives a six-ply pack.

In Fig. 6 the sheet 8 is slitted transversely along the lines d and also along the longitudinal line 0 extending through the webs between the transverse slits. This sheet when folded up forms an eight-ply pack.

In Fig. 7 I show another form, in which the sheet to be .folded is neither rectangular nor square. In this case I cut from the entire sheet two separate pieces 9 and 10, each of them having a projecting portion 11 of an area equal to one-third of the whole piece. In this case each piece is slitted along the line d and is then folded along this line and along the dotted line 6 thus giving a three-ply pack.

It will be noted that in every form the plies are connected at the front, and in every form the sheet is folded both longitudinally and transversely. The slits enable the plies to be opended from one end with the same facility as if the pack were built up of entirely separate sheets.

The packs may be interlocked by slipping a ply of one inside that of another, thus combining two packs in rolling. It will further be noted that the number of plies may be increased by slipping between any two plies of the pack one or more separate sheets of a size corresponding to the size of the pack. This enables me to increase or decrease the number of pliesat will and is of especial advantage in working up small sheets or crop ends which cannot be utilized in the present methods.

The advantages of my invention result from the doubling of the sheet both longitudinally and transversely, also from the slitting, which allows the pack built up in this way to be opened from one end. This system enables wide sheets or plates to be rolled on an ordinary plate or sheet mill, and by doubling them in both directions a pack is obtained which can be at once finished on an ordinary finishing-mill.

Many changes may be made in the form and size of the sheet and the method of slitting and folding without departing from my in- Vention.

I claim- 1. A sheet-metal pack containing a sheet folded lengthwise and crosswise, at least one of the folds being slitted along the foldingline for a part of its length; substantially as described.

2. A sheet-metal pack comprising a sheet folded both lengthwise and crosswise, a portion of the folds being slitted along the folding-line; substantially as described.

3. A sheet-metal pack comprising a sheet folded lengthwise and crosswise, the plies being disconnected along the side edges of the pack, except at the front; substantially as described.

L. A sheet-metal pack, comprising a sheet folded in-layers and disconnected along the sides, at least two of the plies being connected at the front corner only and other plies connected along their front ends; substantially as described.

5. A sheet-metal pack comprising a sheet folded along a folding-line in one direction and also along a folding-line at right angles thereto, one of these folding-lines being cut or slitted for the major part of its length; substantially as described.

6. A sheet-metal pack comprising a sheet which is longitudinally and centrally slitted from one end toward the other and also slitted transversely from opposite sides toward the longitudinal slit and then folded along the lines of the slits; substantially as described.

7. A sheet-metal pack containing folded sheets interlocked with each other, at least one of the sheets being slitted along the folding-line; substantially as described.

8. A sheet-metal pack containing interlocked and folded sheets, each of said sheets being slitted along the folding-line; substantially as described.

In testimony whereof I have hereunto set my hand.

ALEX. PATERSON. 

